Check engine light and code P0496

JAMES KINTON

MEMBER
2010 GMC ACADIA
3.6L
6 CYL
FWD
AUTOMATIC
140,000 MILES

Hi, my engine light came on. I took it to my local auto part store the scanned it and p0496 code come up twice. I replaced fuel rail sensor an the purge valve. My engine light is still on. What else can I do? Trying to avoid taking to a mechanic. Please help

5 Replies

SATURNTECH9

MECHANIC
30,869 POSTS

Where was the purge valve located you replaced?

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Saturday, October 15th, 2016 AT 8:09 PM

JAMES KINTON

MEMBER
10 POSTS

In the front right side of engine.

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Sunday, October 16th, 2016 AT 7:19 AM

JAMES KINTON

MEMBER
10 POSTS

Diverside.

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Sunday, October 16th, 2016 AT 7:20 AM

JAMES KINTON

MEMBER
10 POSTS

Sorry to post so many. I know the purge valve was bad because it would not close. My engine light did go off for a day and the next morning came back on.

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Sunday, October 16th, 2016 AT 7:23 AM

SATURNTECH9

MECHANIC
30,869 POSTS

It is common for the canister purge solenoid valves to stick open like that. What I would like to see is what the fuel pressure tank sensor is reading with the engine off gas cap off and the key in the run position. That would take a advanced scan tool with live data to read that. I have seen those fuel tank pressure sensors get stuck so it tells the computer there is vacuum to tank when there really is not.